26 Minnesota Algae 



Plate II. fig. 3- 



Plant mass gelatinous, amorphous, pale reddish-yellow or greenish; 

 plants 9-10 mic. in diameter, 12-16 mic. in length; sheaths wide, hyaline, 

 colorless; cells 1.6-3. mic. in diameter, 2.2-7.5 "lie. in length, oblong-cylin- 

 drical, single or in pairs; cell contents homogeneous, greenish or becoming 

 paler. 



Massachusetts. Calcareous springs. Newton. (Farlow). New Jersey. 

 On wet rocks. (WoUe). Pennsylvania. On wet rocks. Bethlehem. 

 (Wolle). 



59. Gloeothece rupestris (Lyngbye) Bornet. Les Algues de P. K. A. 

 Schousboe. 177. 1892. Wittrock and Nordstedt. Alg. Aq. Dulc. Exsicc. 

 no. 399. 1880. De Toni. Syll. Algar. S: 63. 1907. 



Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 15. no. 703. 1900; 

 Phyc. Bor.-Am. Fasc. 25. no. 1204. 1905., (G. cystifera (Hass.) Rab.) 



Plate II. fig. 4. 



Families 25-45 r"ic. in diameter, spherical or oval, containing two, four 

 or eight plants; plants 8-12 mic. in diameter, 12-36 mic. in length; sheaths 

 colorless or brownish-yellow; cells 4-5.5 mic. in diameter, 6-15 mic. in 

 length; cell contents blue-green. 



California. On dripping boards. Lake Chabot. San Leandro, Alameda 

 County. June 1902. (Osterhout and Gardner). Bermudas. On ground. 

 Spanish Point. Bermuda. January 1900. (Farlow). 



Var. tepidariorum (A. Br.) Hansirg. Prodromus. 2: 136, f. 46. 1892. 

 De Toni. Syll. Algar. 5: 64. 1907. 



Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 13. no. 601. 1899. 

 (G. cystifera (Hass.) Rab.). 



Plant mass dusky olive or brownish blue-green, often widely expanded; 

 families 21-40 mic. in diameter, 30-50 mic. in length, containing usually two 

 or four plants; cells 5-6 mic. in diameter, 5-15 mic. in length, elliptical or 

 long-cylindrical, after division almost spherical; cell contents finely gran- 

 ular, blue-green. 



Rhode Island. On wood work of a dam. Centredale. April 1894. 

 (Osterhout). 



60. Gloeothece membranacea (Rabenhorst) Bornet. Les Algues de P. K. 



A. Schousboe. 175. 1892. De Toni. Syll. Algar. 5: 61. 1907. 



Plant mass membranaceous (resembling a N o s t o c), dark olive green; 

 cells 4-5 mic. in diameter, 6-10 mic. in length, always oblong before division; 

 sheaths disappearing after third or fourth division. 



North America. (Collins). 



61. Gloeothece lunata W. and G. S. West. On some Freshvvrater Algae 



from the West Indies. Journ. Linn. Soc. Bot. 30: 277. pi. 16. f. 9. 1895. 

 De Toni. Syll. Algar. 5 : 65. 1907. 



